/* Copyright 2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package geb.driver

import org.openqa.selenium.WebDriver
import geb.error.UnableToLoadAnyDriversException

class NameBasedDriverFactory implements DriverFactory {

    public static final String DRIVER_SEPARATOR = ":"

    final ClassLoader classLoader
    final String driverNames

    NameBasedDriverFactory(ClassLoader classLoader, String driverNames) {
        this.classLoader = classLoader
        this.driverNames = driverNames
    }

    WebDriver getDriver() {
        def potentials = getPotentialDriverClassNames()

        def driverClass
        for (potential in potentials) {
            driverClass = attemptToLoadDriverClass(potential)
            if (driverClass) {
                break
            }
        }

        if (driverClass) {
            driverClass.newInstance()
        } else {
            throw new UnableToLoadAnyDriversException(potentials as String[])
        }
    }

    protected attemptToLoadDriverClass(String driverClassName) {
        try {
            classLoader.loadClass(driverClassName)
        } catch (ClassNotFoundException e) {
            null
        }
    }

    protected getPotentialDriverClassNames() {
        driverNames.split(DRIVER_SEPARATOR).collect {
            DriverRegistry.translateFromShortNameIfRequired(it)
        }
    }

}